neurophysiology

Question 1

what is decussation?

Answer 1

axon of the 2nd order neuron crosses over to the opposite side of the CNS.

Question 2

Pain signals are carried by _____ and _____fibres

Answer 2

A-delta
B- C

Question 3

sensory neurons that bring pain sensations into the CNS release which neurotransmitters?

Answer 3

glutamate and/or substance P

Question 4

name 3 disorders of pain sensations

Answer 4

allodynia
Hyperalgesia
hypoalgesia

Question 5

allodynia

Answer 5

Pain due to a stimulus that does not normally provoke pain.

Question 6

Hyperalgesia

Answer 6

Increased pain from a stimulus that normally provokes pain.

Question 7

chemicals that stimulate pain receptors?

Answer 7

Bradykinin
5-HT serotonin
H+
ATP
Prostaglandin
Histamine
Substance P is release by sensory neuron to stimulate mast cells or neutophils to release HIstamine

Question 8

Explain referred pain.

Answer 8

The localization of cutaneus sensation to a particular part of the body also dependes on the particular pathway it takes to the CNS. Pain arising in a visceral structure is percieved as coming from a portion of body surface, because developmentally related nerve fibers come from these anatomically different r

Question 9

Pain management
(endogenous system)

Answer 9

the gate theory
descending pain inhibition pathways